Multiple blow-out fuse.



H. l. GAGNON.

MULTIPLE BLOW OLHr FUSEA APPLICAIION FILED Nov. 22a 19|?.

1,281,553. yPzrltented Oct. 15, 1918.

HENRY J. GAGNON, OF COHOES, NEW YORK.

MULTIPLE BLOW-OUT FUSE.

Specincat'ion of Letterslateiit.

Patented Oct. 15, 1918.

Application led November 22, 1917.- l Serial No. 203,387.

bring one'fuse after another into circuit`- without requiring 4removal ofthe fuse casing or introduction of new parts, until the full number of fuses in the appliance has been exhausted.` An important aim of the invention is to vive an appliance of this character which wiltl be largely held in assembled relation by the fuse elements themselves, and which may be quicklyk taken apart for renewal of the fuse elements when required. A further important purpose of the inven-A tion is to give a simple means for indicating when a fuse has been blown, without exposn i ing the fuse to view, but maintaining itsecurely inclosed. Another purpose is to give a cheap construction in the elements thereof attained by a novel structural forni in certain parts and in the operative relation of the several parts. It is an important purpose to obviate the necessity for removal of the casing or its terminals from the binding post of a switch box or from the clips of a fuse block.

Additional objects, advantages and fea* tures of invention will appear from the construction, arrangement and combination of parts hereinafter set. forth and shown in the drawings, wherein,

yFigure, 1 is a perspective view of the device constructed in accordance with my invention,

Fig. 2 is a similar View of the porcelain core element,

Fig. 3 is a longitudinal sectional view of the device,

Fi'g. 4-

a cross section of the fuse assembled sliowing the blt'nv-out indicator.

Fig. 5 is a detail o'lE the terminal block in thc 'fur-c.

Fig. t is a plan oi the blank For the inse Enolul.

block 13, in the form of Va centrally aper tured disk having a plurality of parallel terminal pin lugs 15 extended from one side thereof in concentric spacedrelation. Within the casing 10 there is a porcelain core ele- `ment 16, having tive V-shaped' channels 17 extended longitudinally therein, and separated from each other by narrow wall portions 18, these channels stopping short of the ends of the'core, through the ends of which registered openings 19 are formed. The pin lugs 15 are adapted to engage snugly in the apertures 19 at one end of the core, and to project 'y a short distance into respective grooves 17. One end of the core is suitably recessed to snugly receive a nut 20, concentrically, the disk-13 being positioned over the nut and apertured to register with the opening in the nut. A core head 21 is provided oi cylindrical forni having a diameter similar to that ofthe core 16, this head being provided with openings 22, therein, corresponding in number and spacing to the open ings 19, and adapted to register therewith,

the openings 22 in the head being slightly enlarged at their outer ends, so as to receive headed pins Q4, having slightly recessed heads adapted to lie within the. enlarged end of the passages through the core head,

'slightly below, or within the end surface of the head, these pins being of a. length to project into corresponding openings 19 and adjacent grooves 17 of the core, when the head is brought int-o close relation with one end of the Core. At its inner side the head Q1 is recessed to hold a nut as shown. MThe casing is of a length equaling the length of the core, its head, and the disk 13, when assembled as indicated, andtitted on each end of the Core and casing, there are terminal caps 27 and 28, which may be stamped from suitable sheet material, being provided with cylindrical fiange portions adapted to tit. snugly around the respective ends of the casing 10. The cap 27 is formed with an car Q9, or other suitable terminal element for cap to receive an assembly screw 29, the cap 27 being engaged over the end of the casing with which the disk 13 is engaged, the screw 29 beingY presented through the disk and engaged with the nut 20, whilethe dlsk 13 is disposed over this nut.l The cap 28 is providedwith an ear 30, similar to the onek 29 at its .outer part, having an inner part suitably secured'V upon the cap at one part, but having a curved tongue 31, as nearly Y concentric with the axis of the cap as may be, this tongue being formed integrally with the earv 30, which has a base portion bent with the tongue 31 at right angles to its outer` part and .secured against the cap 28. Upon the extremity of the tongue 31 a con tact lug 32 'is formed, presented through a suitable opening in the cap, and located at sucha distance from the axis of the cap as to register with the series of openings 23 in the core head when the device is assem-` in the bottoms of. theggrooves'v 17 of the core 16. i

The device is assembled by adjusting the lugs 15 on the disk13 in respective openings 19 of the core at the end with the nut 20, the disk 13 being adjusted closely against the end of the core. Fuses are then introduced in the grooves, one end of each being disposed under the exposed end of the lug 15 in the groove-thereadjacent, and soldered welded, or otherwise secured to form a good electrical contact and prevent withdrawal of the lugs through the end of the core. The pins 24 are then adjusted in the core head,

- and their projecting ends inserted. through the openings19 at the end of the core opposite the lugs 15, the ends'of the pins thereby being positioned over the unsecured end of the fuses. ends of these pins with the lsame means employed at the opposite end of the fuses,it being understood that the nut 25 has been positioned in the recessed inner side of the head. A filling of powdered asbestos orl other suitable material to prevent arcing in case a fuse is blown out is then introduced in the grooves of the core over and around the fuses, and vthis material may be retained by pasting a piece of paper or other fabric 3a around the core, securing it upon the edges of the wall portions 18, and upon the cylindrical end portions of the core. The casing 10 is then adjusted around the core The fuses are then secured to the with the lugs 12 engaged in the notches 11, after which the cap 27 may be adjusted over the disk 13 and adjacent portion of the casing and the screw 29 engaged with the nut 20, whereby the. cap 27 is clamped in position upon the end of the core. The cap 28 4is then adjusted upon the opposite end of the device, the contact 32 being adjusted.

upon one of the .pins 24 and the screw 33 then engaged through the cap and with the nut 25, whereby the cap is held in place. Longitudinally spaced pairs of apertures 37 are formed through the casing 10 centrally over respective grooves, and-through these apertures are inserted the ends of easily fusible elements 3 8, contacting with the fuses adjacent opposite ends, so that in case a fuse is blown out, ,the respective fusible element 38 will also be fused, their medial portions exteriorly of the casing being extremely small and preferablyso shaped or composed as to fuse with a minimum of flagration. Over these elements38 and suitably secured upon the casing, there is a paper or other over the respective grooves, ordinal numbers engagement with the ifuse blocks, when the device i's positioned therein, the ear 29 may y.be adjusted in alinement with the ear 3Q by loosening the screw 29', or they may be given y `positions-in ,different planes having an angular relation, if necessary. It may `be found desirable to turn the fuse block so thatthe lug 32 will bear upon the porcelain head 22 between the pins 24, ifdesiredin which case no current would pass through the de' vice. In that Way, the appliance may be used as a switch element or cut-out although with the "present construction its use in that manner isnot recommended with high voltaves. the device may be readil adjusted upon the fuse clips, or between the binding posts. It is desirable that the device be adjusted with the printed w'rapper bn the casing disposed with number 1 at the outer side, and to more positively indicate the position in which the index number should be placed, the cap clef' ment at one end of the device may have a small point marked thereon as at 40, to serve as an indexpointer. .Incase of trouble upon the line resulting in failure of current/5to pass, it may be det/e has been blown b yy pressing'the finger upon the small fuse wire under the wrapper in line with the index pointer of the device, and 4 if it is possible to press the wrapper down flat against the casing or ifnotable change of form is observable in the small Ifuse, it will be understood that it has been blown.

When the parts are in proper relation, f

`ined whether a fuse4 covering 39, which may have printed thereon place. -When number 5 fuse has been blown,

it will be understood that there are no more fuse in the device for use. The device may of course be made to accommodate a greater or lesser number-of fuses Ythan shown in the` particular embodiment presented in this ap-V plication, as will be understood.

What is claimed: i l. InA a multiple fuse device, a core having a plurality of longitudinal grooves therein, pin elements projecting thereinto from each end of the core, a fiise connected between each two opposed pins, and means to hold the pins against removal from the 1 core.

fuses secured upon thepins in theigrooves,y

the core having an insulator' head at one endV having the enlargements of 'A adjacent pins engaged therein, a` relatively revoluble terminal member at the opposite end of the over the fuse having apertures spaced longi-` core electrically connected with all the adjacent pins,` a terminal member revolubly mounted on said head, and means to form electrical connection between the last named terminal `member and adjacent pinsalternatively.

3. In a fuse, an linsulator inclosure, an elongated fuse therein having a central part of minimum resistance tojfusion, means for making electrical connections with the ends of the fuse, saidfinclosure'havmg a covering tudinally Iover the fuse and an extremely small fuse formed with a central part disposed over said coverin surface and end l portions projecting sli ably Athrough the said apertures into engagement with adja cent end portions of the first named fuse, and a flexiblev covering oversr the second named fuse. i

.L A multiple fuse comprising a core having a plurality of longitudinal grooves, a revoluble terminal at one end having a plurality of pins electrically connected thereto and disposed in respective grooves, an insulator head at thevopposite part of thev core having pins therein projecting into the grooves, fuses connecting the pins in eachy groove said pins in theyhead having contact portions countersunk in the exterior surface of the head, a terminal element mounted ypositioned to successively engage the contact portions of the pins underrelative rotation of the head.

5. As an improved article of manufac ture, a terminal member for multip e fuses of the character described, formed of sheet metal having a part adapted for connection with terminals in an electric circuit and a part constructed to form a bearing support for a rotating element, said last named part having an integral spring tongue formed thereon rand disposed to bear upon` the rotating element when mounted on the sup.- port part. y

6. A terminal for fuses of the character described comprising a contact portion,`\ a

fuse mounting part extended therefrom apertured for a pivot element, a slit being -formed therein concentric with the aperture, the outer material immediatelybeside the slit being inclined to f bear upon a fuse device mounted on the terminal for rotation concentric with said aperture.

- 7 In a device of the characterdescribed, a cased revoluble ,insulator core having longitudinal groovesLtherein stopping short of the ends, pins inserted slidably in the ends of the core longitudinally into lthe grooves, the pins at one end being united upon a plate fixed against relative rotation upon the casing of the core, a terminal ele ment having a revoluble connection with saidplate, fuses in respective grooves of the core soldered to the yends of adjacent pins, a second terminal device revolubly engaged with the appliance at the end opposite the first terminal device, yand vmeans to make electrical connections successively with' ,the adjacent pins under rotation of the core and casing.

8. A fuse device comprising two terminal elements having parallel ear portions and a fuse casing revoluble therebetween, said casing having a plurality of fuse devices eX- tended longitudinally therein all connected atfone end to said terminal elements, a fuse device including a core having a separate head portion at the opposite end from that above mentioned, a plurality of headed pins inserted through said head and the end of the core and attached to respective.

'of said pins, said pins at one end being con-v In testimony whereof I have affixed my' nected to a revolubly mounted terminal, the

signature in presence of two witnesses.

pins at the other end being provided with HENRY J GAGNON. venlargements, and means to selectively en- Witnesses: 5 gage these enlargements as the core is turned GILBERT ROBERT,

on its axis. M. A. GRANGER. 

